CAMRT Radiography Practice Exam

Question: 1 / 1100

What is the primary function of the T wave on an ECG?

Depolarization of the atria

Repolarization of the ventricles

The primary function of the T wave on an electrocardiogram (ECG) is to represent the repolarization of the ventricles. During the cardiac cycle, after the ventricles contract (as indicated by the QRS complex), the heart muscle cells must reset their electrical state in preparation for the next contraction. This resetting process is what is depicted by the T wave.

Repolarization is essential for the heart to maintain a consistent rhythm and proper function. If this process is disrupted, it can lead to arrhythmias or other cardiac issues. The T wave serves as an indicator of how well the ventricles are recovering following contraction, making it a critical aspect of cardiac electrical activity. The other choices refer to different phases of the heart's electrical cycle or states that do not accurately involve the T wave's primary role.

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Ventricular contraction

Electrical inactivity

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